Microsoft recently released to the public its Security Essentials software. According to Microsoft, "Microsoft Security Essentials provides real-time protection for your home PC that gaurds against viruses, spyware, and other malicious software." This is a free download for those using a genuine copy of windows. It is compatible with Windows XP, Vista, and Windows 7. Personally, I would not choose this Security Software. Don't get me wrong, I haven't actually used Security Essentials. I am basing my desicion solely on principle. The main reason we need security is becuase Microsoft created an insecure Operating System. To me this is kind of like buying "rust and paint protection" from the new car dealer. Why don't you just sell me a car with a decent paint job that isn't going to rust easily? Anyway, personal issues aside, this could be just want you are looking for if you want free security software. You can take a look at it here. However, it is not the only free security software available for your computer. Take a look at my previous article where I point out several free security tools for your computer.